public void TestCompressionLowerCase()
{
var compress = new CompressionOutputContext();
var domain = new Domain("EXAMPLE.COM");
var domain_bytes = compress.SerializeDomain(domain);
compress.MoveForward((UInt16)domain_bytes.Length);
var expected = new byte[]
{
7, // Length of 'example'
101,
120,
97,
109,
112,
108,
101,
3, // Length of com
99,
111,
109,
0 // Length of root
};
Assert.That(domain_bytes, Is.EqualTo(expected));
}
public void TestCompressionFirstUse()
{
var compress = new CompressionOutputContext();
var domain = new Domain("example.com");
var domain_bytes = compress.SerializeDomain(domain);
var expected = new byte[]
{
7, // Length of 'example'
101,
120,
97,
109,
112,
108,
101,
3, // Length of com
99,
111,
109,
0 // Length of root
};
Assert.That(domain_bytes, Is.EqualTo(expected));
}
public Tuple <MemoryStream, DNSOutputStream> DNSOutput()
{
var compress = new CompressionOutputContext();
var memory = new MemoryStream();
var stream = new DNSOutputStream(memory, compress);
return(Tuple.Create(memory, stream));
}
/**
* A convenience wrapper around Serialize.
*/
public byte[] ToBytes()
{
var buffer_stream = new MemoryStream();
var compress = new CompressionOutputContext();
var dns_out = new DNSOutputStream(buffer_stream, compress);
Serialize(dns_out);
return(buffer_stream.ToArray());
}
public void TestCompressionMultipleUses()
{
var compress = new CompressionOutputContext();
var domain_stream = new MemoryStream();
var domain = new Domain("example.com");
var domain_bytes = compress.SerializeDomain(domain);
domain_stream.Write(domain_bytes, 0, domain_bytes.Length);
domain = new Domain("hostmaster.example.com");
domain_bytes = compress.SerializeDomain(domain);
domain_stream.Write(domain_bytes, 0, domain_bytes.Length);
var expected = new byte[]
{
7, // Length of 'example'
101,
120,
97,
109,
112,
108,
101,
3, // Length of com
99,
111,
109,
0, // Length of root
10, // Length of hostmaster
104,
111,
115,
116,
109,
97,
115,
116,
101,
114,
// Two bytes worth of pointer - they should have 1 at the 15th
// bit and the 14th bit on the MSB, and the LSB should be 0
// (since that is the offset of the start of the example.com
// domain
192,
0
};
Assert.That(domain_stream.ToArray(), Is.EqualTo(expected));
}
public DNSOutputStream(Stream stream, CompressionOutputContext compress)
{
this.stream = stream;
this.compress = compress;
}